Jack



Feb. 19, 1929. 1,702,356

F. R M GEE JACK ' Filed Dec. 5, 1927 2 Sheets-Sheet l "I? la a; v

17 4 E A 4 H g 66/ 0? i Z J6 J/ JJ Fe4/vz E. f7 655,

4/5" ffarney.

Feb. 19, 1929.

F. R. MCGE'E JACK 2 Sheets-Sheet 2 Filed Dec. 5, 1927 a ffen/vz E 655 Patented Feb. 19, 1929.

UNITED STATES FRANK B. MCGEE, OF STEUBENVILLE, OHIO.

JACK.

Application filed December 5, 1927. Serial No. 237,714.

This invention relates to lifting jacks and more particularly to thermal expansion type of lifting jacks, and has for its object t 1e provisions of portable jacks ot' the thermal expansion type.

Thermal expansion jacks of the class described are capable of use under extreme load conditions and may be used for any purpose where jacks are ordinarily used, such as lifting or pressing.

The jacks of this application are also particularly adapted for separating pipe sections in order to release a valve casing or other element located between two adjacent pipe sections.

In the drawings- Figure 1 is a vertical sectional elevation through a single acting jack, constructed in accordance with this invention.

Figure 2 is a plan thereof.

Figure 3 is a transverse section taken on the line IIIIII of Figure 1.

Figure 4 is a side elevation of the jack of Figure 1.

Figure 5 is a vertical sectional elevation of a double-acting jack, constructed in accordance with this invention.

Figure 6 is a sectional plan taken on the line VIVI of Figure 5.

Figure 7 is a side elevation of the jack of Figure 5.

Figure 8 is a plan of a portion of pipe line having a valve casing mounted therein and showing the jacks of this invention in position to spread the pipe line so as to permit removal of the valve casing.

Referring more particularly to Figures 1 to 4 of the drawings, the numeral 2 designates the base of the jack, which is provided with a centrally arranged threaded aperture to receive a threaded projection 3 on the lower end of a thermal expansion tube 4, each end of which is closed. The tube 4 is provided with inlet and outlet ports 5 and 6, respectively. A pipe 7 is connected with the inlet port 5 and supply pipes 8 and 9 connect through a T-connection with pipe 7. The pipe 8 is adapted to supply steam or other heating fluid to the expansion tube, and the pipe 9 is adapted to supply water, air or other cooling fluid to the expansion tube. The pipes 8 and 9 are provided with valves 10 and 11, respectively, for controlling the flow of fluids through the respective pipes.

A drain pipe 12, having a valve 13 therein,

is connected to the outlet port 6 to ermit the escape of the heating and cooling uids from the expansion tube 4. y

A housing tube 14 is mounted on the base 2 and surrounds the expansion tube 4 in spaced relation. The space between the expansion tube 4 and housing tube 14 may be filled with heat insulating material 'if desired.

The upper end of the expansion tube 4 is screw-threaded to receive the internally threaded load receiving sleeve or tube 16, which has its upper end closed by a wall 17 A load receiving cap 18 is mounted on the end wall 17 of the sleeve 16. The cap 18 is provided with a counterbored unthreaded recess 19 through which a headed bolt 20 projects and is threaded into the upper end of the sleeve 16. The bolt is of sufficient length to permit the expansion tube to be moved through its entire distance of expansion while said cap is heldstationary.

The housing tube 14 is cut away at opposite points, as at 21, to permit access to the sleeve 16 so that said sleeve may be threaded up or down on the expansion tube 4. The upper end of the housing tube 14 is externally threaded to receive an internally threaded load holding sleeve member22.

In operation, assuming that the load indicated at A is to be lifted, the load receiving sleeve 16 will be threaded upwardly on the expansion tube 4 until the cap 18 is in engagement with the load A. Heating fluid will then be admitted through the inlet port 5 from the pipe 8 and the tube 4will expand and lift the load. After the tube 4 has expanded, the load holding sleeve 22 will be threaded up on the tube 14 until it engages the cap 18. The expansion tube 4 will then i be retracted by shutting ott the supplyof heating fluid from the pipe 8 and admitting water or other cooling fluid from the pipe 9. After the expansion tube has been cooled and retracted, the load receiving sleeve 16 will be again threaded upwardly on the expansion tube until the cap 18 again engages the load and the above cycle of steps will be repeated to again elevate or lift the load. The above cycle of steps will be repeated until the load has been lifted the required distance.

In Figures 5 to 7 I have shown a double acting jack composed of a base 30 which is provided with three threaded apertures to receive threaded projections 31, 32 and 33 on the lower ends of three thermal expansion tubes 34, 35, and 36. The tubes and 36 are connected together at their upper ends by a cross-head 37 which is apertured so as to freely fit around the expansion tube 34.

The expansion tubes 34, 35 and 36 are pro vided With inlet ports 33, 39 and 40, and outlet ports 41, 42 and 43, respectively.

A pipe 44 is connected With the inlet port 38 of the tube 34 and is in turn connected through a T-connection with heatin fluid and cooling fluid supply pipes and respectively, Which pipes are provided with control valves 4? and 48, respectively. A drain pipe 49 is connectd to the outlet port 41 of the expansion tube and h. s control valve 50 therein.

The inlet ports 39 and 40 oil the expansion tubes 35 and 36 are connected to pipes 51 and 52, respectively, Which are in turn connected to a manifold pipe 53. The manifold pipe 53 is connected to heating ant. cooling fluid supply pipes 54 and 55, respectively, which are provided With control valves 56 and 57, respectively.

The outlet ports 42 and 43 ot the expai sion tubes 35 and 36 are connected to drain pipes 58 and 59, respectively, Which are provided with control valves 60 and 61, respectively.

The upper end of the expansion tube 34 is externally threaded to receive an internally threaded load receiving sleeve 62 which has its upper end closed by a Wall. The Wall 63 of the sleeve 62 is apertured to permit free passage of the shank of a headed bolt 64, which bolt extends upwardly through the aperture and is threaded in a load receiving cap 65.

The aperture in the cross-head 37 is threaded to receive an externally threaded load receiving sleeve 66 which is adapted to be threaded upwardly into engagement With the cap 65.

In operation, assuming that the load indicated at B is to be lifted, the sleeve 62 will be first threaded upwardly on the expansion tube 34 until the cap 65 engages the load l3. Steam or other heating fluid will then be admitted through the inlet port 33 to heat the expansion tube 34, causing it to expand and lift the load.

After the tube 34 has been expanded the sleeve 66 will be threaded upwardly into ongagement With the cap 65. The expansion tube 34 Will then be cooled so as to compel it to retract by admitting Water or other cool ing fluid through the inlet port 38, and the expansion tubes 35 and 36 will be simultaneously expanded to lift the load another step by admitting steam or other heating fluid through the inlet ports 39 and 40, respectively.

After the tube 34 has been retracted, the sleeve 62 Will be again threaded upwardly on the tube 34 into engagement with the cap 65 so that the tube 34 may be again expanded 1,7oaese to lift the load another step While the tubes 35 and 36 are cooled and retracted, and the sleeve 66 is again reset. The tube 34 and tubes 35 and 36 Will thus be alternately operated to lift the load.

If desired, to obtain a relatively short, powerful lift or stroke of the jack, the sleeves and 66 may both be threaded up against the cap 65 and all three of the tubes 34, 35 and 36 may be simultaneously expanded so to furnish the combined power of all of said tubes. Q in Figure 8 l have shown a plan of pipe line 70, having a valve casing 'Fl therein. When it is desired to remove the valve for any reason it is necessary to spread or expand the pipe line sufiiciently to role the valve casing, and the jacks of this appncaion are particularly adapted for this purpose.

in order to provide means for readily mounting the jacks to spread the pipe joint the pipe sections are provided with mounting lugs '75 adjacent their end against which the base and load receiving cap oi the jack may be engaged as indicated. After the jacks are mounted in position they wi l be operated in the usual manner to expand the pipe joint and release the valve casin i l.

/Vbile have shown and described certain specific embodiments of my invention it Will be understood that I do not wish to be limited thereto since various modifications may be made Without departing from the scope of my invention as defined in the appended claims.

I claim- 1. A lifting jack comprising a base, a then mal expansion tube having one end secured to said base and having inlet and outlet ports therein, a load receiving cap secured to the other end of said tube and movable relative thereto, means for suppl mg a heating fluid to said tube through c port to extend said tube, and means .i maintaining said cap in its extended position when said tube cooled and retracted.

2. A lilting jack comprising a base, a thermal expansion tube having one end secured to said base and having inlet and outlet ports therein, a load receiving cap secured to the other end 01 said tube and movable relative thereto, means for supplying a heating fluid to said tube through said inlet port to extend said tube, and an extensible supporting men1- ber separate from said tube adapted to be extended to maintain said cap in its extended position when said tube is cooled and retracted.

3. A double acting lifting aclr comprising a base, a tubular thermal expansion member having one end secured to said base and having inlet and outlet ports therein, a load receiving member adjustably secured to the other end of said tubular member, a load receiving cap secured to said load receiving member and movable relative thereto, and a second thermal expansion member secured to said base and adapted to engage said load receiving cap, said second named thermal expansion member being provided with inlet and outlet ports, and means for alternately admitting heating and cooling fluids to said thermal expansion members to alternately expand and contract said members.

4. A double acting lifting jack comprising a base, a tubular thermal expansion member having its lower end secured to said base and having inlet and outlet ports therein, a load receiving member mounted on the upper end of said thermal expansion member and adjustable vertically relative thereto, a load receiving cap mounted on said load receiving member and movable vertically relative thereto, a second thermal expansion member secured to said base and having inlet and outlet ports therein, a load receiving member mounted on said second thermal expansion member and adjustable vertically relative thereto, said last named loadreceiving memher being free to be moved into engagement with said load receiving cap independent of said first named load receiving member or simultaneously therewith, means for providing heating and cooling fluids to said thermal expansion members, and means for controlling the flow of fluids to said members.

5. A double acting lifting jack comprising a base, a tubular thermal expansion member having one end secured to said base and having inlet and outlet ports therein, a load receiving member adjustably secured to the other end of said tubular member, a load receiving cap secured to said load receiving member and movable relative thereto, an extensible load holding member adapted to be adjusted vertically to support the load and load receiving cap when said expansion member is retracted, and means for alternately admitting heating and cooling fluids to said thermal expansion members to alternately expand and contract said members.

6. A double acting lifting jack comprising a base, a tubular thermal expansion member having one end secured to said base and having inlet and outlet ports therein, a load receiving member adjustably secured to the other end of said tubular member, a load receiving cap secured to said load receiving member and movable relatively thereto, a second tubular thermal expansion member adapted to be adjusted vertically to support the load and load receiving cap when said first expansion member is retracted, and means for alternately admitting heating and cooling fluids to said thermal expansion members to alternately expand and contract said members.

T. A double acting lifting jack comprising a base, a tubular thermal expansion member having its lower end secured to said base and having inlet and outlet ports therein, a load receiving member mounted on the upper end of said thermal expansion member and adjustable vertically relative thereto, a load receiving cap mounted on said load receiving member and movable vertically relative thereto, a pair of other thermal expansion members secured to said base and having inlet and outlet ports therein, a cross head connecting said last named thermal expansion members, a load receivin member mounted on said cross head and adjustable vertically relative thereto, said last named load receiving member being free to be moved into engagement with said load receiving cap independent of said first named load receiving member or simultaneously therewith, means for providing heating and cooling fluids to said thermal expansion members, and means for controlling the flow of said fluids.

In testimony whereof, I have hereunto set my hand.

FRANK R. MoGEE. 

